A boner that curves upward, resembling an upturned banana. Legend has it it's especially good at stimulating the elusive g-spot on the female anatomy, but I wouldn't know because I have a straight boner.
by Darren Key June 27, 2005
something late 90's and early 2000's highschool kids used to say a lot. its when a male uses a banana and puts it in his pants to trick the female thinking it's really his
sydney: man dylan's good!
bria: wdym it's a B.B
sydney: what's that?
bria: it's a banana boner
sydney: so it's not really his?
bria: nah
bria: wdym it's a B.B
sydney: what's that?
bria: it's a banana boner
sydney: so it's not really his?
bria: nah
by carrotsandparrots April 5, 2020
When a male has such a large erection, (Particularly during sex), that his penis begins to curve upward to resemble the shape of a banana.
by SE123 March 11, 2014
When you have a Boner, have your female accomplice smack your cock with a Banana until the Boner goes away.
Dude, I had a boner for like 4 hours for no reason and it hurt so I had your mom give me a Banana Boner Jammer .
by FatalBuddha July 19, 2009